>> as christopher said, we started out as debating about the topic of science and faith. in fact, are these world views compatible? for me, they are. as a believer, the opportunity to do science and see god's hands in nature is a wonderful, positive experience. christopher, obviously, has taken a different view and has been articulate in his argument, on the side of atheism. so we began with the circumstance of having an intellectual jousting about this, and he is a very impressive debater and intellect, but over the course of time, we became friends. i have great respect for the way he could amass arguments and facts, and then he developed cancer, and i reached out to him, hearing that, to see if there was anything i could do to help, because he was clearly in a difficult place, having esophageal cancer, which had already spread beyond its original site, so we met many times in his apartment to talk about philosophical issues, to talk about literature and history, but also to talk about medical issues related to his cancer. >> did you ever think that you could really hel